MEASUREMENT OF THE (P)OVER-BAR-P-](LAMBDA)OVER-BAR-LAMBDA AND (P)OVER-BAR-P-](SIGMA)OVER-BAR(0)LAMBDA+CC REACTIONS AT 1.726 AND 1.771 GEV C/

Interest in the production of hyperon-antihyperon pairs following anti proton-proton annihilation stems largely from attempts to understand t he nature of flavor production. To date the major focus of both the ex perimental and the theoretical effort has been on the (p) over bar p-- ><(Lambda)over bar>Lambda reaction. In this paper, we present data on the complementary channels (p) over bar p--><(Sigma)over bar>(0) Lambd a and (p) over bar p--><(Lambda)over bar>Sigma(0). Events from the kin ematically similar (p) over bar p--><(Lambda)over bar>Lambda reaction were obtained in parallel. The procedure to distinguish these three se parate reactions is described and results for all channels are present ed. These include the total and differential cross sections, hyperon p olarizations, and spin correlation coefficients. Data were obtained at incident antiproton lab momenta of 1.726 and 1.771 GeV/c which corres pond to excess kinetic energies in the (p) over bar p--><(Lambda)over bar>Sigma(0)+c.c. reaction of 26 and 40 MeV, respectively, above thres hold. Comparisons are made to earlier work at similar excess energies in the (p) over bar p--><(Lambda)over bar>Lambda channel. The low-ener gy regime has been highlighted in this experiment to reduce the comple xity in the theoretical analysis.